Darth Vader in Tokyo

As George Lucas had said, Star Wars A New Hope referred to Three Rascals in the Hidden Fortress, directed by Akira Kurosawa. Perhaps for this reason, we always can see many characters from Star Wars such as the following Darth Vader.

Undoubtedly he is the powerful Darth Vader. What the hell dose he doing? Obviously without spaceship, Darth Vader has to select the metro. Of course the change is so necessary. 坐地铁